Surface infiltration formula (Water Overlay): Difference between revisions

Revision as of 07:58, 17 October 2019

Surface infiltration is calculated per cell.

First, the infiltration capacities are calculated:

C_water = W_surface

$C_{t o p} = m a x (I_{c o n}, I_{s u r f})$ $I_{s u r f} = 0$ if a construction is present $I_{c o n} = 0$ if no construction is present

Then the actual infiltration:

$Δ w = m i n (C_{w a t e r}, Δ t \cdot C_{t o p})$

Where:

$C_{w a t e r}$ = The amount of infiltration that can take place based on the amount of water on the surface.
$C_{t o p}$ = The amount of infiltration that can take place based on the infiltration values present.

$W_{s u r f a c e}$ = The amount of water (the water column) on the surface.
$I_{c o n}$ = The GROUND_INFILTRATION_MD of a construction on a specific cell (if present).
$I_{s u r f}$ = The GROUND_INFILTRATION_MD of the surface terrain type. This value should be interpreted as the vertical conductivity (Kv) of the sub-soil.

The following topics are related to this formula.

Formulas: Surface water level formula; Groundwater level formula; Underground infiltration formula
Models: Surface model; Underground model; Infiltration model; Substance flow model

@@ Line 3: / Line 3: @@
 First, the infiltration capacities are calculated:
 : ''C<sub>water</sub> = W<sub>surface</sub>''
-: ''C<sub>top</sub>'' = max( I<sub>con</sub>, I<sub>surf</sub> )
+<math>C_{top} = max( I_{con}, I_{surf})</math>
-:: I<sub>surf</sub> = 0 if a construction is present
+<math>I_{surf} = 0</math> if a construction is present
-:: I<sub>con</sub> = 0 if no construction is present
+<math>I_{con} = 0</math> if no construction is present
 Then the actual infiltration:
 <math>\Delta w = min( C_{water}, \Delta t \cdot C_{top})</math>